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Treatment of congo red dye wastewater using spinel catalysts
Published in Alka Mahajan, Parul Patel, Priyanka Sharma, Technologies for Sustainable Development, 2020
Kishankumar Patel, Avinash Vagjiani, Sanjay Patel
Commercially available congo red having 99% purity was obtained from HPLC. Crystal form of copper nitrate, ferric nitrate and citric acid were obtained from CDH Pvt. Ltd. Sodium hydroxide pellets obtained from SRL and dilute hydrochloric acid was used to adjust the pH.
Glass-Fiber Catalysts
Published in Andrey Zagoruiko, Sergey Lopatin, Structured Glass-Fiber Catalysts, 2019
Andrey Zagoruiko, Sergey Lopatin
Then the modified support was impregnated by the water solution of the copper chromite precursors. One of the precursors was copper dichromate; the second one was a mixture of copper nitrate as a copper source and glycine as a combustible additive.
Effect of Chemical Structure on Polymer Properties
Published in Anil Kumar, Rakesh K. Gupta, Fundamentals of Polymer Engineering, 2018
Recently, Goddart et al. [6] reported a polyvinyl alcohol–copper (II) initiating system, which can produce branched polymers on surfaces. The initiating system is prepared by dissolving polyvinyl alcohol in water that already contains copper nitrate (or copper chloride). The calcium carbonate filler is dipped into the solution and dried. If this is used for polymerization of an olefin (say, styrene), it would form a polymer that adheres to the particles, ultimately encapsulating them. The mechanical properties of calcium-carbonate-filled polystyrene have been found to depend strongly on filler–matrix compatibility, which is considerably improved by this encapsulation.
Experimental analysis and theoretical certainity of thermal conductivity of CuO based therminol D-12 nano fluid
Published in International Journal of Ambient Energy, 2022
M. Anish, J. Jayaprabakar, Nivin Joy, V. Jayaprakash, A. Prabhu, T. Arunkumar
A precursor was prepared by combining glycine with metal nitrates in their appropriate stoichiometric ratios with an aqueous solution. Copper nitrate and glycine are the constituents for the preparation of the nanoparticles. Glycine and nitrate salts were dissolved in a beaker containing 20 ml water and the solution was stirred for an hour at room temperature. This solution was later heated for 1 h at a temperature of 160°C. The magnetic pellet was removed from the solution when the liquid became a gel. Foam like substance was formed on further heating. Combustion of this substance took place at a temperature of 170°C. The particles formed on combustion were collected and was ground into fine particles using a mortar and pestle. Calcination was performed for two hours at 600°C to obtain CuO nanoparticles. In comparison with similar compositions made using the different process like amorphous citrate process, glycine-nitrate-produced powders had greater compositional uniformity, less residual carbon levels and smaller particle sizes. Nanoparticle size, chemical bond, shape, distribution, stability are revealed during the characterisation of the nanoparticle. Scanning electron microscopy (SEM) is generally used to find the morphology, microstructure and optical properties of the nanoparticles (Figures 1–3). Crystal structures of the nanoparticle are studied using the XRD images.
Antibacterial properties of Cu-doped TiO2 prepared by chemical and heat treatment of Ti metal
Published in Journal of Asian Ceramic Societies, 2021
Kanae Suzuki, Taishi Yokoi, Misato Iwatsu, Maiko Furuya, Kotone Yokota, Takayuki Mokudai, Hiroyasu Kanetaka, Masakazu Kawashita
Subsequently, 0.121 g of Cu(NO3)2∙3H2O was dissolved in 5 cm3 of ultrapure water. The copper nitrate aqueous solution was diluted 100-fold to obtain approximately 1 mol/m3 of copper nitrate solution. A 6 cm3 aliquot of diluted copper nitrate solution was transferred to a polytetrafluoroethylene, round-bottom test tube. The alkaline-treated Ti chip was then immersed and shaken at 120 strokes/min for 48 h at 80°C. After the treatment, the chip was removed and washed with ultrapure water. The Ti chip treated with the copper nitrate solution was heat treated at 600°C for 1 h using a muffle furnace (MSFS-1218, Yamada Denki Co., Ltd., Tokyo, Japan). The obtained samples treated with copper nitrate solution were named AL-Cu-HT. A sample obtained by alkaline treatment and further heat treatment at 600°C for 1 h was used as the control sample, and was named AL-HT.
Homogeneous precipitation and urea-nitrate combustion preparation of nanostructured CuO/CeO2/ZrO2/Al2O3 oxides used in hydrogen production from methanol for fuel cells
Published in Particulate Science and Technology, 2020
Javad Baneshi, Mohammad Haghighi, Hossein Ajamein, Mozaffar Abdollahifar
In the other side, a typical procedure to prepare the homogeneous precipitation precursor CCZA-HP is depicted in Figure 2, which is divided into three stages. In stage (a), a nitrate-based aqueous solution of precursors was prepared by mixing copper nitrate trihydrate, cerium nitrate hexahydrate, zirconium nitrate pentahydrate, and aluminum nitrate nonahydrate. Then, urea was added to the solution of metal nitrates which the molar ratio of urea to nitrates was set 20. In stage (b), the hydrolyze of urea was occur by heating the mixture up to 90 °C for 24h to release the hydroxide ions as precipitants agent. In the last stage, the obtained precipitates were washed with deionized water and dried at 80 °C overnight under air flow. Finally, mixed oxides were calcined at 400 °C for 3h in air, and the resulted nanocatalysts were shaped.